Based on the central theme of the European Union’s relations with the Eastern neighbourhood, this curricular unit is broad in the way it approaches the European Union’s external relations from a conceptual perspective, and specific in the regional approach it proposes. This curricular unit begins by discussing the dynamics of integration and enlargement in the process of internal construction of the European Union and the impact that this process has on its dimension as an international actor. It focuses on the eastern neighborhood of the European Union, addressing the various issues on the agenda and the way in which relations with the Russian Federation have contributed to facilitating or hindering European policies in this region. The curricular unit also explores the potential and limitations of these processes, as well as their future challenges. [Course taught in English]